Numbers / 634

The Number 634

634 is composite: factorization 2 × 317. That gives 634 exactly 4 divisors: 1, 2, 317, 634. 634's proper divisors total just 320, 314 short of 634, the deficient case most of 634's neighbors share too. 634 has a digit sum of 13; for 634, the digital root works out to 4. 634: 2 all divide 634 evenly, out of 2-12. 634 is 1001111010 in binary and 27A in hex; as a Roman numeral it's DCXXXIV.